From PEOPLE Magazine Click to enlarge
ANNE HATHAWAY
From teen princess to red-carpet queen

Starring in 2006's The Devil Wears Prada taught Hathaway, 26, "how much fun you can have with clothes," she says. But it was chopping her hair off for last year's Rachel Getting Married that proved her real fashion breakthrough. "There was something very liberating about a new hairdo," she explains, adding that now "I try to get away with as much as I can. My style is: Fool 'em with glamour!"

AMY ADAMS
Became a leading lady

Although Adams, 34, landed her first movie role back in 1999, it wasn't until her 2006 Oscar nomination for Junebug that top designers finally began offering to dress her. That attention "is an amazing gift," she says. "I just hope I represent them well." So far, there have been no complaints from fans like Oscar de la Renta and Carolina Herrera. "She is young and curvy and beautiful," Herrera says. "The type of woman you want to dress!"

KATE WINSLET
Learned what works

"In the last few years, I feel very settled within myself," says Winslet. Nowhere has that been more obvious than on the red carpet, where the Oscar winner, 33, now forgoes unflattering trends (skin-tight leather, anyone?) in favor of simple silhouettes. Winslet says her fashion experiences have changed her in another way as well: "You become incredibly girlie!"

HOW TO DROP 10 LBS.—INSTANTLY!

1 STICK TO ONE COLOR
"Monochromatic outfits help you appear slim, especially if the color is dark," says Project Runway's Nina Garcia.

2 BAN BAGGY ITEMS
"Wearing fitted clothing actually makes you look thinner than trying to hide your figure under bulky clothes," says Garcia.

3 PICK VIBRANT ACCESSORIES
"Your feet will never look fat," says Garcia. "Wear bright accessories to liven up a dull look."

4 CHOOSE BELTS WISELY
"Wide belts will not give you a waist," says Garcia. "Wear a thinner, more proportioned one over shifts or blouses."

TINA FEY
Stepped out from behind the scenes

Accustomed to what her stylist Tom Broecker calls a writer's uniform of "jeans, Uggs and a sweatshirt," it took some coaxing to bring out Fey's inner sex goddess. "When you first meet her, she's cute," says her hairstylist Ted Gibson, "but she can really turn into a bombshell!" It helps, says designer David Meister, who dressed Fey, 38, in a navy blue, sample-size gown for the Emmys, that she has "a rockin' body! And she's starting to work it."

CARRIE UNDERWOOD
Swapped country charm for couture

The American Idol winner used to rely on "jeans and a pretty top" when going out, says her stylist Trish Townsend. But since becoming a bona fide country superstar, Underwood, 26, "is more willing to take risks," says Townsend, who has steered her client toward designers like Naeem Khan and Badgley Mischka. "The bolder her music gets, the bolder she gets!"

ALICIA KEYS
Bye-bye, tomboy

In 2001 Keys became almost as well known for her signature look of braids and pants outfits as she did for her hit single "Fallin'." Today, however, the singer is "more comfortable with herself as a woman," says her stylist Wouri Vice, which means she has tossed the tight jeans in favor of soft dresses by designers including Giorgio Armani. "She has really been able to wear new silhouettes and colors," Vice says of Keys, 29. "She's transformed."

GINNIFER GOODWIN
All grown up

After slimming down with what she admits was "a lot" of yoga and later adopting a vegan diet, Goodwin, 30, now favors "formfitting things," says her stylist Penny Lovell. The other striking difference in the Big Love star's look these days? "She's confident," Lovell says, "and happy."

GLAM STYLE TIPS—ON A BUDGET!

BUY CHEAP BLING
Bold statement pieces from budget-friendly stores like Forever 21 "are a great way to jazz up any outfit," says stylist Penny Lovell.

FIND FUNKY SHOES
"Fun platforms change a look instantly," says Lovell, who suggests brands like BCBGirls for trendy buys.

SCOUR VINTAGE SHOPS
Pick pieces that have great patterns, even if the cut is outdated. "Weird sleeves? Cut them off!" says Lovell. "You get a great dress for the cost of a tailor."

Miss Me "Vernice" platform pump, $44.95; endless.com

Stein Mart Silver necklace, $19.99; steinmart.com for locations

  • Contributors:
  • Additional reporting by Alexis Chiu,
  • Mary Green,
  • Sara Hammel,
  • Isabelle Miller,
  • Jenny Sundel.